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  <title>改变根目录</title>

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</div><hr /><div id="function.chroot" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">chroot</h1>
  <p class="verinfo">(PHP 4 &gt;= 4.0.5, PHP 5)</p><p class="refpurpose"><span class="refname">chroot</span> &mdash; <span class="dc-title">改变根目录</span></p>

 </div>

 <div class="refsect1 description" id="refsect1-function.chroot-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="type">bool</span> <span class="methodname"><strong>chroot</strong></span>
    ( <span class="methodparam"><span class="type">string</span> <code class="parameter">$directory</code></span>
   )</div>

  <p class="para rdfs-comment">
   将当前进程的根目录改变为
   <em><code class="parameter">directory</code></em>。
  </p>
  <p class="para">
   本函数仅在系统支持且运行于 CLI，CGI
   或嵌入 SAPI 版本时才能正确工作。此外本函数还需要 root 权限。
  </p>
 </div>


 <div class="refsect1 parameters" id="refsect1-function.chroot-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>

    
     <dt>
<em><code class="parameter">directory</code></em></dt>

     <dd>

      <p class="para">
       新目录
      </p>
     </dd>

    
   </dl>

  </p>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-function.chroot-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   成功时返回 <strong><code>TRUE</code></strong>， 或者在失败时返回 <strong><code>FALSE</code></strong>。
  </p>
 </div>


 <div class="refsect1 examples" id="refsect1-function.chroot-examples">
  <h3 class="title">范例</h3>
  <p class="para">
   <div class="example" id="example-2269"><p><strong>Example #1 <span class="function"><strong>chroot()</strong></span> example</strong></p>
    <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br />chroot</span><span style="color: #007700">(</span><span style="color: #DD0000">"/path/to/your/chroot/"</span><span style="color: #007700">);<br />echo&nbsp;</span><span style="color: #0000BB">getcwd</span><span style="color: #007700">();<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</code></div>
    </div>

    <div class="example-contents"><p>以上例程会输出：</p></div>
    <div class="example-contents screen">
<div class="cdata"><pre>
/
</pre></div>
    </div>
   </div>
  </p>
 </div>


 <div class="refsect1 notes" id="refsect1-function.chroot-notes">
  <h3 class="title">注释</h3>
  <blockquote class="note"><p><strong class="note">Note</strong>: <span class="simpara">此函数未在 Windows 平台下实现。</span></p></blockquote>
 </div>

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